Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4d0d7e8a2ccce4e…

MALICIOUS

PDF

56.6 KB Created: 2020-07-29 20:45:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d61edc05705b147ca7e5b4018d729a6 SHA-1: 3056033f78e120ee5515aedef860f699d22067bd SHA-256: f4d0d7e8a2ccce4e924d2a96a15186d656bafb1aa92c51dd92c15a2fa28164b9
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file exhibits characteristics of a link farm, embedding a significant number of external links. One of these links, 'https://ttraff.ru/pify?keyword=moulting+in+insects+pdf', is flagged as pointing to known malicious redirector infrastructure. The document body appears to be heavily obfuscated or corrupted, preventing a clear understanding of its intended lure. However, the sheer volume of links and the malicious redirector strongly suggest an intent to lead users to malicious content.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=moulting+in+insects+pdf
    • http://files.botleyfencing.com/uploads/1/3/0/7/130739379/9264026.pdf
    • http://files.proyectocubabat.com/uploads/1/3/0/8/130813953/9604443.pdf
    • http://files.parrellohara.com/uploads/1/3/0/8/130814346/bupugefabalap-xewoduwunexajug-fuzuretijes.pdf
    • http://files.neurokitchen.org/uploads/1/3/1/1/131164095/vufuzujo-lenurexukalo-faxabodaz.pdf
    • https://cdn.shopify.com/s/files/1/0430/4338/9597/files/pujulalom.pdf
    • https://cdn.shopify.com/s/files/1/0430/6544/2457/files/toromolanup.pdf
    • https://cdn.shopify.com/s/files/1/0431/6394/3074/files/47238157389.pdf
    • https://cdn.shopify.com/s/files/1/0440/7630/2486/files/52513907219.pdf
    • https://cdn.shopify.com/s/files/1/0436/0234/6148/files/33174615654.pdf
    • https://cdn.shopify.com/s/files/1/0431/7557/5709/files/woxazotisogu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8904/3358/files/jifuzurajesigujuwenasu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6377/1293/files/67764219186.pdf
    • https://cdn.shopify.com/s/files/1/0430/8742/9785/files/12378004308.pdf
    • https://cdn.shopify.com/s/files/1/0429/5216/3482/files/ziwovemejatesutidani.pdf
    • https://cdn.shopify.com/s/files/1/0429/4216/9244/files/jemoravapabe.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009ef8.bin
da40ba74c95c0c2183b8b9b72914dd0187d9ac34d1c8f3070d83a7987ba1b82c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9EF8 4904 bytes
font_01_sfnt_off0000afd1.bin
e4433b3a6e4a0f65f86c4b20871cbebc4c309e5bf670679339c737ffc5e5f67e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAFD1 10956 bytes

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